i just came across phoronix.com when searching for something for mythtv (Mythbuntu 7.10: An Excellent MythTV Distribution). phoronix is pretty comprehensive… here are a few of the posts that caught my eye:

• Measuring Ubuntu’s Boot Performance
• Ubuntu’s Power Consumption Tested
• Need advice Linux laptops
• ATI R700 Series Gain ALSA HDMI Audio
• Defining The Phoronix Test Suite
• Ubuntu 7.10 + WINE vs. Windows XP
• The Truth About ATI/AMD & Linux
• NVIDIA GeForce 8500GT 256MB
• ASUS Motherboard Ships With Embedded Linux, Web Browser